Pulverizing-machine



(No Model.)

J. HFTRAVER. PULVERIZING MACHINE.

Patented Jan. 9, 1894.

WITNESSES:

ms NATIONAL LWHOGRAPHINR COMPANY.

WASHINETGN. u. e.

PATENT FFKQE.

JOHN H. TRAVER, OF ASPEN, COLORADO.

PULVERlZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 512,635, dated January 9, 1894.

Application filed February 24, 1393. Serial No. 463,625. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. TRAVER, of Aspen, in the county of Pitkin and State of Colorado, have invented a new and Improved Pulverizing-Machine, of which the following is a full, clear, and exact description.

My invention relates to improvements in that class of pulverizing machines which are adapted to pulverize rpck for assaying purposes, and which are intended to pulverize the rock exceedi'nglyfinein order thata proper assaying may be'made.

The object of my invention is to produce a simple machine of this kind which may be operated either by hand or other power, which is provided with a movable screen and funnel adapted to screen the crushed material, which has a mortar and pestle for grinding purposes and has the mortar arranged so that it may be conveniently tipped to deposit its load on the screen, which is constructed in such a way that the pestle may be easily raised when necessary, and which has means for conveniently throwing the screen shaker in and out of gear.

To this end my invention consists in certain features of construction and combinations of parts, as will be hereinafter described and claimed. 7

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in all the views.

Figure 1 is a perspective viewof the machine embodying my invention, showing the several parts in position for use. Fig. 2 is a vertical section on the line 22 in Fig. 1 and with the pestle raised, and Fig. 3 is a side elevation, partly in section, showing in detail the connection between the lifting lever and the pestle shaft.

The machine is provided with an upper frame 10 carried on a base 11, and this is supported on a lower frame 12, although the two frames and the base may be made one if desired. On the base 11 is a mortar 13 strong enough to withstand the strain to which it is subjected and this is carried on a sliding base 14 which is hinged, as shown at 15, to a slide 16 held to move back and forth in a slideway 17, this arrangement enabling the mortar to be pushed forward to the front portion of the machine so that it may be conveniently tipped over and dumped. Above the mortar is a heavy pestle 18 which has a smooth lower portion shaped to [it snugly in the mortar, the pestle being made smooth as it is necessary to grind the rock exceedingly fine.

The pestle 18 is carried by a vertical shaft 19 which turns in suitable bearings in the frame 10 andthe shaft is turned by a bevel gear wheel 20 which has its set screw 21 held in a longitudinal keyway 22 in the shaft so that the shaft may-slide through the gear when the pestle 18 is to be raised. The gear wheel 20 is driven by a gear wheel 23 on the driving shaft 24, which shaft is mounted in suitable bearings 25 and is provided at its Outer end with a balance wheel 26 having a crank 27 by which it may-be turned and having also on its inner side a rim wheel or flange 28 to which a belt may be applied if desired. It will be seen then that by turning the shaft 24 the shaft 19 and pestle 18 will be also turned and the material in the mortar 13 pulverized.

On the back portion of the machine is a nearly vertical lever.29 which is fulcrumed near the center, as shown at 29 in Fig. 2, and the upper end of this lever is pulled forward by a spring'30 which holds said upper end against the driving shaft 24 and in the path of a boss or screw 31 on the shaft. Consequently the rotating of the shaft causes the boss to strike and move the lever in one direction and the spring pulls it back in the opposite direction. I

The lever moves in a slot in the base 11, as indicated in Fig. 2, and its lower end is connected by a link 32 with the horizontally moving shaker arm 33 which extends forward beneath the base 11 and is connected by a link 34 with the funnel 35, the opposite side of the funnel being supported by achain 36, or its equivalent, which is secured to the main frame. The funnel has at its upper end a screen 38 which is held in a suitable receptacle 37, and beneath the funnel is a nearly cylindrical holder 39 supported by arms 40 extending upward to the base 11, and the holder is adapted to carry a pan 41 which receives the screened material dropped from the funnel 35.

It will be seen from the above description that the rotating of the driving shaft will cause the funnel and screen to be shaken so that all the fine material will drop through the machine and into the sample pan.

If it is not necessary to use the shaker; that is, if the mortar and pestle are being used for grinding only, the shaking mechanism may be thrown out of gear, and to this end ashaft 42 is journaled in the lower portion of the frame 10 and behind the lever 29, the shaft having at its outer end a hand wheel 43 and on its inner end a cam 44 which may be turned against the lever 29, thus throwing the lower end of said lever forward and moving its upper end backward out of the path of the boss orscrew 31. Above and parallel with the shaft 24is. a shaft 45 on which is an arm 46, the free end of which extends beneath a collar 47 on the pestle shaft 19, and the shaftis provided at one end with a suitable hand wheel 48 and with a laterally extending lever 49 which, bybeing moved downward, turns theshaft 45.80. asto throw the arm 46 upward and this movement causes the collar 47 and shaft 19 .to be raised so as to lift the pestle from the mortar. The shaft 45 may be turned. by

either the hand wheel 48 or by the lever 49 and may be turned by the hand wheel independently of the lever, as the lever is journaledloosely on the shaft, see Fig. 3, and adjacent to the fulcrumed end of the lever is a ratchet wheel 49 having a single tooth which is adapted to engage a pawl 49 pivoted on the lever, this pawl being held in place by a spring 49. It will thus be seen that when the lever isthrown down the ratchet wheel will be engaged by the pawl and the shaft 45 and arm 36 turned so as to lift the pestle. The lever 49 has a latch lever 50 of the customary kind, fulcrumed near its free end, and a pin 51 on thelatch lever projects through the lever 49 and is adapted to enter a perforation in the plate 52, which is secured to the lower portion of the frame 10, and by depressing the lever 49 and placing the pin 51 in engagement with the plate, the arm 46 will be held in an elevated position, as shown in Fig. 2, thus holdingthe pestle 18 above the mortar 13 so that the latter may be emptied or filled conveniently. It will also be understood that the lever 49'may be operated so as to raise the shaft 19 slightly, in case it is necessary to remove the pestle somewhat from the bottom of the latter. On the frame 10 and extending outward over the wheel 48 and into the path of the lever 49 is a stop arm 53, which prevents the lever 49 from being thrown over too far.

until the arm again comes in contact with the collar 47 and the ratchet wheel into engagement with the pawl 49'. When the machine is to be used for grinding, however, thelever 49 is released and raised.

When the machine is used the pestle 18 is raised as described, a charge of rock to be crushed is placed in the mortar, and the driving shaft 24 turned, the shaking mechanism for operating the screen being meanwhile thrown out of gear in the manner described above. After the charge has been ground the pestle 18 is raised by throwing down the lever 49 and the mortar is pushed forward into the position shown by dotted lines in Fig. 2, and tipped to throw its lead upon the screen 38. If more material is to be ground, the mortar is recharged and againplaced in positionand the pestle is dropped again into themortar. The cam 44 is thrown out of engagement with the lever 29, and the revolution of the driving shaft oscillates the said lever and shakes the screenand funnel soas to carry the fine material downward through the screen and into the sample pan. p

Having thus described my invention, I claim as new and desire to secure by Letters Patent- I A 1. A pulverizing machine, comprising a mortar hinged to a slide,'a revoluble pestle held to turn in the mortar, and alevermechanism for raising the pestle, substantially as described.

2. Apulverizing machine, comprisinga revoluble and vertically moving pestle,a lever mechanism for lifting the pestle, means for holding the pestle in a raised position, a mortar arranged beneath the 'pestlean'd adapted to slide out of the path of the pestle, and a shaking screen adapted to receive the ground material from the mortar, substantially as described. p

3. In a pulverizingmachine, the combination of the mortar, the pestle held to turn in the mortar, the vertical shaft arranged to carry the pestle and adapted to move vertically in its bearings, the shaft having a longitudinal keyway therein, a driving gear secured to the shaftand having a set screw projecting into thekeyway of the shaft,driving mechanism 'connectedvwith the gear, a lifting shaft journaledat right angles to the pestle shaft, a lever'mechanism for turning the lifting shaft, and means, as a collar on the pestle shaft and the arm on the lifting shaft, for raising the pestle, substantially as described. v

4. The combination of the pulverizing'machine with the tilting mortar, the revoluble pestle'held to turn in the mortar, the shaking screen adapted to receive material from the mortar, the driving shaft adapted to revolve the pestle, an oscillating lever moved by the driving shaft, an operative connection between the oscillating'lever and the'shaking screen, and means for throwing the shaking journaled on the second shaft, a pawl on the mechanism in and out of gear, substantially lever to engage the ratchet wheel, and a fas- 10 as described. tening device to fix the position of the lever,

5. The combination, with the pestle shaft, substantially as described.

5 a second shaft at right angles to the pestle JOHN H. TRAVER.

shaft and means for raising the pestle shaft Witnesses: by the turning of the second shaft, of a ratchet ULMAR GARTLAND, wheel on the second shaft, a lever loosely OEAsER GARRETT. 

